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</a></div> <!----></nav>  <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Spring Web</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/notebook/spring-web/" aria-current="page" class="sidebar-link">Spring 整合 Web</a></li><li><a href="/notebook/spring-web/ApplicationContextAware.html" class="sidebar-link">ApplicationContextAware</a></li><li><a href="/notebook/spring-web/Bean的装配方式.html" class="sidebar-link">Bean 的装配方式</a></li><li><a href="/notebook/spring-web/浏览器端存储技术简介.html" class="active sidebar-link">浏览器端存储技术简介</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#cookie" class="sidebar-link">Cookie</a></li><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#localstorage" class="sidebar-link">LocalStorage</a></li><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#sessionstorage" class="sidebar-link">SessionStorage</a></li><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#userdata、globalstorage、google-gear" class="sidebar-link">UserData、GlobalStorage、Google Gear</a></li><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#flash-shareobject-flash-cookie" class="sidebar-link">Flash ShareObject（Flash Cookie）</a></li><li class="sidebar-sub-header"><a href="/notebook/spring-web/浏览器端存储技术简介.html#附-cookieutils" class="sidebar-link">附：CookieUtils</a></li></ul></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="浏览器端存储技术简介"><a href="#浏览器端存储技术简介" class="header-anchor">#</a> 浏览器端存储技术简介</h1> <h2 id="cookie"><a href="#cookie" class="header-anchor">#</a> Cookie</h2> <p>Cookie 是指存储在用户本地终端上的数据，同时它是与具体的 Web 页面或者站点相关的。Cookie 数据会自动在 Web 浏览器和 Web 服务器之间传输，也就是说 HTTP 请求发送时，会把保存在该请求域名下的所有 Cookie 值发送给 Web 服务器，因此服务器端脚本是可以读、写存储在客户端的 Cookie 的操作。</p> <h2 id="localstorage"><a href="#localstorage" class="header-anchor">#</a> LocalStorage</h2> <p>在 HTML5 中，新加入了一个 localStorage 特性，这个特性主要是用来作为本地存储来使用的，解决了 Cookie 存储空间不足的问题(Cookie 中每条 Cookie 的存储空间为 4k)，localStorage 中一般浏览器支持的是 5M 大小，这个在不同的浏览器中 localStorage 会有所不同。</p> <h2 id="sessionstorage"><a href="#sessionstorage" class="header-anchor">#</a> SessionStorage</h2> <p>SessionStorage 与 LocalStorage 的唯一一点区别就是 LocalStorage 属于永久性存储，而 SessionStorage 属于当会话结束的时候，SessionStorage 中的键值对就会被清空。</p> <h2 id="userdata、globalstorage、google-gear"><a href="#userdata、globalstorage、google-gear" class="header-anchor">#</a> UserData、GlobalStorage、Google Gear</h2> <p>这三种的使用都有一定的局限性，例如</p> <ul><li>userData 是 IE 浏览器专属，它的容量可以达到 640K，这种方案可靠，不需要安装额外插件，只不过它仅在IE下有效</li> <li>globalStorage 适用于 Firefox 2+ 的浏览器，类似于 IE 的 userData</li> <li>google gear 是谷歌开发出的一种本地存储技术，需要安装 Gear 组件</li></ul> <h2 id="flash-shareobject-flash-cookie"><a href="#flash-shareobject-flash-cookie" class="header-anchor">#</a> Flash ShareObject（Flash Cookie）</h2> <p>这种方式能能解决上面提到的 Cookie 存储的两个弊端，而且能够跨浏览器，应该说是目前最好的本地存储方案。不过，需要在页面中插入一个 Flash，当浏览器没有安装 Flash 控件时就不能用了。所幸的是，没有安装 Flash 的用户极少。</p> <h2 id="附-cookieutils"><a href="#附-cookieutils" class="header-anchor">#</a> 附：CookieUtils</h2> <div class="language-java extra-class"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">com<span class="token punctuation">.</span>funtl<span class="token punctuation">.</span>leeshop<span class="token punctuation">.</span>commons<span class="token punctuation">.</span>utils</span><span class="token punctuation">;</span>

<span class="token keyword">import</span> <span class="token namespace">javax<span class="token punctuation">.</span>servlet<span class="token punctuation">.</span>http<span class="token punctuation">.</span></span><span class="token class-name">Cookie</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">javax<span class="token punctuation">.</span>servlet<span class="token punctuation">.</span>http<span class="token punctuation">.</span></span><span class="token class-name">HttpServletRequest</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">javax<span class="token punctuation">.</span>servlet<span class="token punctuation">.</span>http<span class="token punctuation">.</span></span><span class="token class-name">HttpServletResponse</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span><span class="token class-name">UnsupportedEncodingException</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>net<span class="token punctuation">.</span></span><span class="token class-name">URLDecoder</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>net<span class="token punctuation">.</span></span><span class="token class-name">URLEncoder</span><span class="token punctuation">;</span>

<span class="token comment">/**
 * Cookie 工具类
 * &lt;p&gt;Title: CookieUtils&lt;/p&gt;
 * &lt;p&gt;Description: &lt;/p&gt;
 *
 * 
 * 
 * @date 2017/12/10 22:00
 */</span>
<span class="token keyword">public</span> <span class="token keyword">final</span> <span class="token keyword">class</span> <span class="token class-name">CookieUtils</span> <span class="token punctuation">{</span>

    <span class="token comment">/**
     * 得到Cookie的值, 不编码
     *
     * @param request
     * @param cookieName
     * @return
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">String</span> <span class="token function">getCookieValue</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token function">getCookieValue</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 得到Cookie的值,
     *
     * @param request
     * @param cookieName
     * @return
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">String</span> <span class="token function">getCookieValue</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span> <span class="token keyword">boolean</span> isDecoder<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">Cookie</span><span class="token punctuation">[</span><span class="token punctuation">]</span> cookieList <span class="token operator">=</span> request<span class="token punctuation">.</span><span class="token function">getCookies</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieList <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> cookieName <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token class-name">String</span> retValue <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> cookieList<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieList<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>cookieName<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    <span class="token keyword">if</span> <span class="token punctuation">(</span>isDecoder<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                        retValue <span class="token operator">=</span> <span class="token class-name">URLDecoder</span><span class="token punctuation">.</span><span class="token function">decode</span><span class="token punctuation">(</span>cookieList<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token string">&quot;UTF-8&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                    <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
                        retValue <span class="token operator">=</span> cookieList<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
                    <span class="token punctuation">}</span>
                    <span class="token keyword">break</span><span class="token punctuation">;</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">UnsupportedEncodingException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span> retValue<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 得到Cookie的值,
     *
     * @param request
     * @param cookieName
     * @return
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">String</span> <span class="token function">getCookieValue</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span> <span class="token class-name">String</span> encodeString<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">Cookie</span><span class="token punctuation">[</span><span class="token punctuation">]</span> cookieList <span class="token operator">=</span> request<span class="token punctuation">.</span><span class="token function">getCookies</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieList <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> cookieName <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token class-name">String</span> retValue <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> cookieList<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieList<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>cookieName<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    retValue <span class="token operator">=</span> <span class="token class-name">URLDecoder</span><span class="token punctuation">.</span><span class="token function">decode</span><span class="token punctuation">(</span>cookieList<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> encodeString<span class="token punctuation">)</span><span class="token punctuation">;</span>
                    <span class="token keyword">break</span><span class="token punctuation">;</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">UnsupportedEncodingException</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span> retValue<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">setCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span>
                                 <span class="token class-name">String</span> cookieValue<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">setCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值 在指定时间内生效,但不编码
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">setCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span>
                                 <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">int</span> cookieMaxage<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">setCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">,</span> cookieMaxage<span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值 不设置生效时间,但编码
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">setCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span>
                                 <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">boolean</span> isEncode<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">setCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> isEncode<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值 在指定时间内生效, 编码参数
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">setCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span>
                                 <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">int</span> cookieMaxage<span class="token punctuation">,</span> <span class="token keyword">boolean</span> isEncode<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">doSetCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">,</span> cookieMaxage<span class="token punctuation">,</span> isEncode<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">setCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span>
                                 <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">int</span> cookieMaxage<span class="token punctuation">,</span> <span class="token class-name">String</span> encodeString<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">doSetCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">,</span> cookieMaxage<span class="token punctuation">,</span> encodeString<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 删除Cookie带cookie域名
     */</span>
    <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">deleteCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span>
                                    <span class="token class-name">String</span> cookieName<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token function">doSetCookie</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> response<span class="token punctuation">,</span> cookieName<span class="token punctuation">,</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值，并使其在指定时间内生效
     *
     * @param cookieMaxage cookie生效的最大秒数
     */</span>
    <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">void</span> <span class="token function">doSetCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span>
                                          <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">int</span> cookieMaxage<span class="token punctuation">,</span> <span class="token keyword">boolean</span> isEncode<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieValue <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                cookieValue <span class="token operator">=</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span>isEncode<span class="token punctuation">)</span> <span class="token punctuation">{</span>
                cookieValue <span class="token operator">=</span> <span class="token class-name">URLEncoder</span><span class="token punctuation">.</span><span class="token function">encode</span><span class="token punctuation">(</span>cookieValue<span class="token punctuation">,</span> <span class="token string">&quot;utf-8&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
            <span class="token class-name">Cookie</span> cookie <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Cookie</span><span class="token punctuation">(</span>cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieMaxage <span class="token operator">&gt;</span> <span class="token number">0</span><span class="token punctuation">)</span>
                cookie<span class="token punctuation">.</span><span class="token function">setMaxAge</span><span class="token punctuation">(</span>cookieMaxage<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">!=</span> request<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token comment">// 设置域名的cookie</span>
                <span class="token class-name">String</span> domainName <span class="token operator">=</span> <span class="token function">getDomainName</span><span class="token punctuation">(</span>request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//                System.out.println(domainName);</span>
                <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token string">&quot;localhost&quot;</span><span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>domainName<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    cookie<span class="token punctuation">.</span><span class="token function">setDomain</span><span class="token punctuation">(</span>domainName<span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span>
            cookie<span class="token punctuation">.</span><span class="token function">setPath</span><span class="token punctuation">(</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            response<span class="token punctuation">.</span><span class="token function">addCookie</span><span class="token punctuation">(</span>cookie<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 设置Cookie的值，并使其在指定时间内生效
     *
     * @param cookieMaxage cookie生效的最大秒数
     */</span>
    <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">void</span> <span class="token function">doSetCookie</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">,</span> <span class="token class-name">HttpServletResponse</span> response<span class="token punctuation">,</span>
                                          <span class="token class-name">String</span> cookieName<span class="token punctuation">,</span> <span class="token class-name">String</span> cookieValue<span class="token punctuation">,</span> <span class="token keyword">int</span> cookieMaxage<span class="token punctuation">,</span> <span class="token class-name">String</span> encodeString<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">try</span> <span class="token punctuation">{</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieValue <span class="token operator">==</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                cookieValue <span class="token operator">=</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
                cookieValue <span class="token operator">=</span> <span class="token class-name">URLEncoder</span><span class="token punctuation">.</span><span class="token function">encode</span><span class="token punctuation">(</span>cookieValue<span class="token punctuation">,</span> encodeString<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
            <span class="token class-name">Cookie</span> cookie <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Cookie</span><span class="token punctuation">(</span>cookieName<span class="token punctuation">,</span> cookieValue<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>cookieMaxage <span class="token operator">&gt;</span> <span class="token number">0</span><span class="token punctuation">)</span>
                cookie<span class="token punctuation">.</span><span class="token function">setMaxAge</span><span class="token punctuation">(</span>cookieMaxage<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">!=</span> request<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token comment">// 设置域名的cookie</span>
                <span class="token class-name">String</span> domainName <span class="token operator">=</span> <span class="token function">getDomainName</span><span class="token punctuation">(</span>request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//                System.out.println(domainName);</span>
                <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token string">&quot;localhost&quot;</span><span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>domainName<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                    cookie<span class="token punctuation">.</span><span class="token function">setDomain</span><span class="token punctuation">(</span>domainName<span class="token punctuation">)</span><span class="token punctuation">;</span>
                <span class="token punctuation">}</span>
            <span class="token punctuation">}</span>
            cookie<span class="token punctuation">.</span><span class="token function">setPath</span><span class="token punctuation">(</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            response<span class="token punctuation">.</span><span class="token function">addCookie</span><span class="token punctuation">(</span>cookie<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>

    <span class="token comment">/**
     * 得到cookie的域名
     */</span>
    <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">String</span> <span class="token function">getDomainName</span><span class="token punctuation">(</span><span class="token class-name">HttpServletRequest</span> request<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token class-name">String</span> domainName <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>

        <span class="token class-name">String</span> serverName <span class="token operator">=</span> request<span class="token punctuation">.</span><span class="token function">getRequestURL</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">if</span> <span class="token punctuation">(</span>serverName <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> serverName<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span><span class="token string">&quot;&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            domainName <span class="token operator">=</span> <span class="token string">&quot;&quot;</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
            serverName <span class="token operator">=</span> serverName<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            serverName <span class="token operator">=</span> serverName<span class="token punctuation">.</span><span class="token function">substring</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">final</span> <span class="token keyword">int</span> end <span class="token operator">=</span> serverName<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">&quot;/&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            serverName <span class="token operator">=</span> serverName<span class="token punctuation">.</span><span class="token function">substring</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> end<span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">final</span> <span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> domains <span class="token operator">=</span> serverName<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">&quot;\\.&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">int</span> len <span class="token operator">=</span> domains<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
            <span class="token keyword">if</span> <span class="token punctuation">(</span>len <span class="token operator">&gt;</span> <span class="token number">3</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token comment">// www.xxx.com.cn</span>
                domainName <span class="token operator">=</span> <span class="token string">&quot;.&quot;</span> <span class="token operator">+</span> domains<span class="token punctuation">[</span>len <span class="token operator">-</span> <span class="token number">3</span><span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token string">&quot;.&quot;</span> <span class="token operator">+</span> domains<span class="token punctuation">[</span>len <span class="token operator">-</span> <span class="token number">2</span><span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token string">&quot;.&quot;</span> <span class="token operator">+</span> domains<span class="token punctuation">[</span>len <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span>len <span class="token operator">&lt;=</span> <span class="token number">3</span> <span class="token operator">&amp;&amp;</span> len <span class="token operator">&gt;</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                <span class="token comment">// xxx.com or xxx.cn</span>
                domainName <span class="token operator">=</span> <span class="token string">&quot;.&quot;</span> <span class="token operator">+</span> domains<span class="token punctuation">[</span>len <span class="token operator">-</span> <span class="token number">2</span><span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token string">&quot;.&quot;</span> <span class="token operator">+</span> domains<span class="token punctuation">[</span>len <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
            <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
                domainName <span class="token operator">=</span> serverName<span class="token punctuation">;</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span>

        <span class="token keyword">if</span> <span class="token punctuation">(</span>domainName <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> domainName<span class="token punctuation">.</span><span class="token function">indexOf</span><span class="token punctuation">(</span><span class="token string">&quot;:&quot;</span><span class="token punctuation">)</span> <span class="token operator">&gt;</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> ary <span class="token operator">=</span> domainName<span class="token punctuation">.</span><span class="token function">split</span><span class="token punctuation">(</span><span class="token string">&quot;\\:&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            domainName <span class="token operator">=</span> ary<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">return</span> domainName<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>
</code></pre></div></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">上次更新:</span> <span class="time">2021/4/15 上午11:39:30</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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